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I have:

  • P410 + 512MB Battery Backup
  • 4x4TB in RAID 5

I changed the PSU today and after starting OS (Windows 2008 R2) the array is gone.

ACU sees 2 HDD as unassigned and original RAID 5 as 2 OK and 2 HDD missing.

How can I restore the original array without losing data?

  • If the data is of any value, talk to either HP Support or contact a local data recovery company. Of course there are things you can try, but the results would be unknown and so would be at considerable risk. – Mike Mar 26 '16 at 10:30
  • WHY would you use RAID 5 with 4TB disks - nobody uses R5 any more, it's not the '90's - you're literally asking for data corruption. – Chopper3 Mar 26 '16 at 11:01
  • ok what RAID you will recommended i have now 2x 12TB RAID 5 (4x4TB) – MarkKiss Mar 28 '16 at 19:28
  • I need maximum space and fast read (write is not important because isn't often) – MarkKiss Mar 28 '16 at 19:51
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I think your first step is to recover the data. Recovery software can help here. Scan the drives with ReclaiMe it should find the RAID config parameters. R-Studio and UFSexplorer are also popular for RAID recovery.

  • R-Studio recognize my raid and I backup 90% of all data ( 10% is probably something what i deleted before raid was lost ) – MarkKiss Mar 28 '16 at 19:30

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